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        <h2 id="写在前面："><a href="#写在前面：" class="headerlink" title="写在前面："></a>写在前面：</h2><p>开发的时候，前后端不论是否分离，接口多半是滞后于页面开发的。所以建立一个REST风格的API接口，给前端页面提供虚拟的数据，是非常有必要的。json server 作为模拟工具，因为设置简单，容易上手。本文是做一个简单的上手介绍，有需要的朋友可以做一下参考，喜欢的可以点波赞，或者关注一下，希望可以帮到大家。</p>
<blockquote>
<p>本文首发于我的个人blog：<a href="http://obkoro1.com/" target="_blank" rel="noopener">obkoro1.com</a></p>
</blockquote>
<h3 id="json-server-工具"><a href="#json-server-工具" class="headerlink" title="json server 工具:"></a>json server 工具:</h3><p>在后台还没给接口之前，使用JSON-Server搭建一台JSON服务器，将接口要返回的数据放在json文件里面。然后请求这些数据，这样我们可以先做一些东西，等后台接口好了之后直接替换就可以了，不必一直傻傻的等后端的接口。</p>
<h4 id="安装："><a href="#安装：" class="headerlink" title="安装："></a>安装：</h4><pre><code>npm install json-server --save //json server
npm install axios --save //使用axios发送请求
</code></pre><h4 id="json文件："><a href="#json文件：" class="headerlink" title="json文件："></a>json文件：</h4><p>创建一个json文件，起名叫db.json，文件放置在跟index.html平级的目录中，也可以放置在static文件夹中，db.json文件里面的内容，是一个对象。</p>
<h3 id="设置："><a href="#设置：" class="headerlink" title="设置："></a>设置：</h3><p>位置： build/dev-server.js</p>
<pre><code>//json-server 假数据
var jsonServer = require(&apos;json-server&apos;) //引入文件
var apiServer = jsonServer.create(); //创建服务器
var apiRouter = jsonServer.router(&apos;db.json&apos;) //引入json 文件 ，这里的地址就是你json文件的地址
var middlewares = jsonServer.defaults(); //返回JSON服务器使用的中间件。
apiServer.use(middlewares)
apiServer.use(&apos;/json&apos;,apiRouter)
apiServer.listen( port + 1,function(){ //json服务器端口:比如你使用8080,这里的json服务器就是8081端口
  console.log(&apos;JSON Server is running&apos;)  //json server成功运行会在git bash里面打印出&apos;JSON Server is running&apos;
})
</code></pre><p>如图所示：</p>
<p><img src="https://raw.githubusercontent.com/OBKoro1/articleImg_src/master/juejin/1cd6d748943c968c65eb135b322c6f0b?raw=true" alt=""></p>
<h3 id="请求接口代理："><a href="#请求接口代理：" class="headerlink" title="请求接口代理："></a>请求接口代理：</h3><pre><code>proxyTable: {
  &apos;/api&apos;: {
    target: &apos;http://localhost:8081/&apos;,  // 通过本地服务器将你的请求转发到这个地址
    changeOrigin: true,  // 设置这个参数可以避免跨域
    pathRewrite: {
      &apos;/api&apos;: &apos;/&apos;
    }
  },
},
</code></pre><p>如下图所示：</p>
<p><img src="https://raw.githubusercontent.com/OBKoro1/articleImg_src/master/juejin/3af73c621b7523aa0f3a2fd95d1bd38c?raw=true" alt=""></p>
<h3 id="npm-run-dev启动项目可以访问到你的json文件："><a href="#npm-run-dev启动项目可以访问到你的json文件：" class="headerlink" title="npm run dev启动项目可以访问到你的json文件："></a>npm run dev启动项目可以访问到你的json文件：</h3><p>现在服务器已经成功启动，在地址栏输入 localhost:8081，就可以看到的json文件，加上相应后缀即可访问文件里面的数据。下面几张图片出自：<a href="http://blog.csdn.net/biubiubiuzzz/article/details/78066621" target="_blank" rel="noopener">biubiubiuzzz</a></p>
<p>jsonserver服务器：</p>
<p><img src="https://raw.githubusercontent.com/OBKoro1/articleImg_src/master/juejin/50baa471e48b88d8dc595e0dc8cd60b7?raw=true" alt="jsonserver服务器"></p>
<p>json数据：<br><img src="https://raw.githubusercontent.com/OBKoro1/articleImg_src/master/juejin/cd31ad94fb979187133c4d1c8f5d9572?raw=true" alt="json数据"></p>
<h2 id="axios请求json数据："><a href="#axios请求json数据：" class="headerlink" title="axios请求json数据："></a>axios请求json数据：</h2><p>光看到这些数据可不行，我们还需要发起请求，请求到这些数据，然后执行各种各样的骚操作。</p>
<h3 id="main-js文件中："><a href="#main-js文件中：" class="headerlink" title="main.js文件中："></a>main.js文件中：</h3><pre><code>import axios from &apos;axios&apos;;//引入文件
Vue.prototype.$ajax = axios;//将axios挂载到Vue实例中的$ajax上面,在项目中的任何位置通过this.$ajax使用
</code></pre><p>在组件中的使用方式，比如：</p>
<pre><code>   this.$ajax({
       url:&apos;/api/articles&apos;,//api 代理到json文件地址，后面的后缀是文件中的对象或者是数组
       method:&apos;get&apos;,//请求方式
       //这里可以添加axios文档中的各种配置
     }).then(function (res) {
       console.log(res,&apos;成功&apos;);
     }).catch(function (err) {
       console.log(err,&apos;错误&apos;);
     })
//还可以像下面这么简写
  this.$ajax.get(&apos;api/publishContent&apos;).then((res) =&gt; {
   console.log(res,&apos;请求成功&apos;)
  },(err)=&gt;{
    console.log(err,&apos;请求失败&apos;);
  });
</code></pre><h3 id="JSON-Server只接受GET请求，GitHub上提到："><a href="#JSON-Server只接受GET请求，GitHub上提到：" class="headerlink" title="JSON-Server只接受GET请求，GitHub上提到："></a>JSON-Server只接受GET请求，GitHub上提到：</h3><p>If you make POST, PUT, PATCH or DELETE requests, changes will be automatically and safely saved to db.json using lowdb.</p>
<p>lowdb介绍： <a href="http://www.jianshu.com/p/11d04a4c22af" target="_blank" rel="noopener">http://www.jianshu.com/p/11d04a4c22af</a></p>
<h3 id="文档："><a href="#文档：" class="headerlink" title="文档："></a>文档：</h3><p>附上<a href="https://github.com/typicode/json-server" target="_blank" rel="noopener">json server</a>的github，和<a href="https://www.kancloud.cn/yunye/axios/234845" target="_blank" rel="noopener">axios</a>的中文文档，大家可以进去研究一下。</p>
<p>json server设置和使用起来还是蛮方便的，大家感兴趣的话，可以跟着文章设置一波。</p>
<p><strong>最后</strong>：如需转载，请放上原文链接并署名。码字不易，<strong>感谢</strong>支持！本人写文章本着交流记录的心态，写的不好之处，不撕逼，但是欢迎指点。然后就是希望看完的朋友点个<strong>喜欢</strong>，也可以<strong>关注</strong>一下我。<br><a href="http://obkoro1.com/" target="_blank" rel="noopener">blog网站</a>  and <strong><a href="https://juejin.im/user/58714f0eb123db4a2eb95372" target="_blank" rel="noopener">掘金个人主页</a> </strong></p>
<p>以上2017.11.1</p>
<h3 id="参考资料"><a href="#参考资料" class="headerlink" title="参考资料:"></a>参考资料:</h3><p><a href="http://blog.csdn.net/u012911742/article/details/73162761" target="_blank" rel="noopener">JSON-Server使用</a><br><a href="http://blog.csdn.net/biubiubiuzzz/article/details/78066621" target="_blank" rel="noopener"> vue-cli下配置json-server</a></p>

      
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